Ice-making machine.



GRAAFP. ZOE MAKING MACHINE.

APP LIOATION FILED SEPT. 26, 1911.

1,082,944 Patented DecLSO, 1913.

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Be it known that I Wtnenwr Grim-err, merchant; a: subjcotzonthe GermanEmperor,

and. residing: at? 7 Linlzista'asse, Berlin," 1 1V. G.-, in the" Kin;of: Prussian. Ger-t many, have inventedmertsin new and usetnlImprovements in: Ice-Mhhing Machines,

- of which the following-is a spmification:

The present invention relates toiceanaking machinesand: inparticulars-rte such in which the refrigoratingmediumzis expelled from asolution in the one of two. communiv cating, permanently closedandnevacuated v vessels and then condensed in the other of thesevesselsandsubsequently again allowed i to evaporate, whereupon thevapors pro-- duced are again absorbed in the first vessel.

The vessel first mentioned, in which. the refrigerating mediumisexpelled from a solution or miXtureand-in which it is again-- absorbedshall hereinafter be referred to as the absorber and the second vessel,in.

Which-the cold medium iscondensed and again revaporated shall bereferredto as the refrigerator.

A machine of the hereinbefore mentioned type has, for instance,beendescribed in the United States Patent 958,683; The present inventionrelates to the-special arrangement of the refrigerator in machines ofthe type mentioned. In, the machines hitherto known the refrigeratorWas'either a'smoothtages are avoided in the present invention by therefrigerator being made approximately bell-shaped, as'for instance,providing an outer cylinder surrounding an inner cylinder which 1s openat one end. By varying the diameter of this inner cyl1nder it ispossible to make the volume of therefrigerator of any desired size so asto obtain the most. favorable ratio :vbetween the vapor space and thesurface of the refrigerator to be cooled, so thatilneo'ificatton'offlettcrs PatehtL Patented Dec. so, rare.

the vapors-passing: from the, absorber to the refrigerator will berapidly cormtensed. The described arrangementof theretrigen ator willfurthermore reduce the liquid space; the liquid preferably only reachingup to the communicating pipe bet-wcenthe refrigerator and the absorber,which allows eta sutiiciently large quantity ofidistillate 1n therefrigerator. In consequence thereof all vapor passing over into'therefrigerator "Wlll be condensed into a liquid form, but allsurplus-liquid produced in the refrigerator will flow through the hollowshaft back into the absorber. Where it will be again evaporated, By suchmeans the mixture contained in the absorber can never lee-evaporatedbeyond a given degree of concentration and an overheating and consequentdecomposition of the chemicals contained in the absorber'is impossible,and the efiiciencv of the machine will therefore not beimpaired Furtheradvantages of such bell shaped refrigerators consist in. that it is ofsimple design and can be easily and surely kept tight, and that bothrefrigerator and absorbcr may be made' of the same length,

whereby the manufacture of the machine is greatly simplified, Thedrawing illustrates a constructional form. of the present invention indiagram and parb section.

In this drawing a is the vessel serving as distiller and absorber, b thevessel serving as the condenser and refrigerator. The pipe of forms ameans of communication between.- This pipe, which passesthe two vessels.through the absorber a, is provided Within the latter With perforations,so that the vapors can pass freely from a to b or from b to a; The endsof pipe 0 projecting from L) n the absorberrcst 1n stutable bearings0i", so

that both vessels can be rotated by means of a crank e or any othersuitable device. Within \the vesseloc are arranged plates 1,

which are preferably made of a dish-like shape and perforated. Theseplates serve to promote the conduction of the heat-and the agitating ofthe absorption liquid, besides increasing the evaporating orabsorbingsure iaces respectively and preventing. the absorbing medium beingcarried overlnto the condenser.

the free head tvall of the vessel 6 is arranged a second, preferablycylindrical vessel 9' so as to have a'close ]O1Ili3 therewith, and thecavity of the vessel 6 is thereby conmachine is therefore siderablyreduced. The ratio between the is therefore impossible for theabsorption nation .of a vessel medium in vessel a to be overheated. As

furthermore the vapor space of the refrigerator is correspondinglyreduced, the vapor passing over from a will more quickly come intocontact with the cool walls of the same, so that the distillation isconsiderably ac celerated.

In consequence of tho hereinbefore described arrangement of therefrigerator the cooling surface of the same is on the one handconsiderably increased, so that during the distillation, process thecoolin may be effected simultaneously from insl e in the cavity is andfrom outside, for instance by means of sprinkler pipes h and i, and onthe other hand ice may be produced during the freezing process bothwithin the cavity k and on the outer surface of the refrigerator, forinstance in a hood of suitable shape placed over the same.

The invention is not mentioned bell shaped form of the refrigerator, asany other suitable form may be r used to the same advantage.

I lam! j 1'. ant ice-making machine the combivessels being in 'sorber,said I said absorber comprising a plurality of centrally open absorberthrough said I 'tions, said inner vessel being limited to the above-;

serving as an absorber with a vessel serving as a refrigerator, bothaxial alinement, and a cooling arrangement for said refrigerator; saiabsorber being provided with a hollow axle which extends along its wholelength and opens centrally into one end of said refrigerator, saidhollow axle having a plurality of radial perforations within theabsorber, and a plurality of diaph'ragms in the abdiaphragms having eachacplurality, of perforations. f

2. An ice making machine having an absorber and a condenser in axiala'hnement, cylinder with a diaphragms, a1. axiall situated hollow shaftrigidly connected to the cylinder and pro ectmg at both ends thereof,said shaft having radial erforations within the cylinder; externalbearings for sai shaft wherein it is mounted to revolve; said condenserbeing rigidly mounted at one end of said shaft and comprising an outerand an inner vessel forming a'closed chamber between them, saidchambercommunicating with the interior of the shaft and its perfora-. open atone end; sprinkling means for the inside of said inner vessel and theoutside of said outer vessel, heating means for the absorbenandrevolving means for said shaft, whereby the absorber and the condensermay be simultaneously rotated. I

WILHELM GRAAFF,

' Witnesses: I

' LOUIS E. PHILIIBON,

I HENRY HAsPn'a'.

